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Here are the best kids fitness trackers in 2021

Fitness trackers (also known as activity trackers) are popular with adults who exercise regularly and those who simply want to get an idea of how many steps they take each day. While most fitness trackers are designed for grown-ups, there are a few that made specifically for kids. The idea isn't necessarily fitness, per se, but more so to help motivate kids to get more active and have fun doing it. Many activity trackers for kids include even more fun features. But the best kids fitness tracker is definitely the Fitbit Ace 3, which also happens to be the newest on the market. It strips things down to the basics with a simple design, reliable tracking of data, and intuitive app experience, making it the best option you can get for young ones.

Best Overall: Fitbit Ace 3

Ideal for kids aged 6-12, the Fitbit Ace 3 boasts two main upgrades over the previous-generation Ace 2: longer battery life at a rated eight days per charge and a greater selection of animated clock faces that change and do different things as the child takes more steps and achieves goals. There are 28 in all, from the monster Fred who grows its body from a single blinking eyeball to a full torso with arms and legs as kids take more steps, to the Martian who dances each time the child gets three lightning bolts, achieved through steps.

With a secure and adjustable silicone band, it comes in black/red or blue/green but some kids will gravitate right to the upcoming Minions-themed bands. Set it up and pair it with the Fitbit app, which shows both a parent and kid view. If you already have a Fitbit device, it's easy to add the Ace 3 using the My Family set-up then flip between your view and theirs. But you don't have to have a Fitbit to use it – the account just has to be managed by a parent.

In addition to tracking daily steps and active minutes, the Ace 3 can also display reminders to move, bedtime reminders, and alarms (if you choose to set them up). On the device itself, kids can set timers, use a stopwatch, and activate modes like do not disturb (great for during school hours), sleep (which stops notifications and dims the screen at night), and water lock to deactivate buttons in the shower or pool – yes, the device is completely swim-proof. It logs detailed sleep data so you can see how many hours of sleep your little one got at night as well as how restless they were. I love that the tracker has Fitbit's reputation for reliable tracking behind it and accomplishes what a kids' tracker should without loading it up with too many bells and whistles.


  • Really fun animated clock faces
  • Kid-friendly design
  • Accurately tracks just the basics
  • Totally swim-proof


  • Not the best option for older kids
  • Can't download more apps
  • Greyscale screen

Best Overall

Fitbit Ace 3

Best for little ones

The Fitbit Ace 3 reports how much activity and sleep kids get, and kids will love the motivational animations and easy operation.

Best for Younger Kids: * Fitbit Ace 2 *

While the Ace 3 is worth the extra bucks thanks to the fun clock animations and longer battery life, if you're really pinching pennies, the Ace 2 is still a solid option. My nine-year-old has been wearing that one for over two years now and absolutely loves it. Like the Ace 3, it comes with an adjustable silicone band sized to fit little wrists, but in three other finish options: blue/yellow, watermelon/teal, or grape. Also swim-proof, it's best suited to kids aged 6-12 – for older kids, consider other models from Fitbit.

There are fewer customization options and features with the Ace 2 versus the Ace 3, including only a couple of clock faces and no extra modes. But it does still have the timer, reminders to move, bedtime reminders, active goal minutes, and alarms. And it works seamlessly with the Fitbit app, set up with a Kid View, and as part of the My Family if the parent owns a Fitbit device as well.

The battery lasts for a respectable up to five days and, like the Ace 3, the Ace 2 also provides detailed sleep information, including the time the child fell asleep and woke up as well as restless periods throughout the night. Kids receive virtual badges after accomplishing goals, racking them up where they become viewable in the app. If you can find the Ace 2 for a super-cheap price that's significantly cheaper than the Ace 3, it's a good option.


  • Simple, kid-friendly design
  • Totally swim-proof
  • Tracks only the basics


  • Battery doesn't last as long Ace 3
  • Not a lot of personalization options
  • Only suitable for younger kids

Great Option for Young Ones

Fitbit Ace 2

Save some dough

The Ace 2 is almost – almost – as good as the Ace 3. But at half the price, it's totally worth grabbing.

Best for More Than Fitness: * Garmin vivofit jr. 2 *

While the Fitbit Ace 3 and Ace 2 focus primarily on activity and sleep, the Garmin vivofit jr. 2 adds some other elements to the mix, including the ability for parents to set reminders and deliver awards for things like completing chores, finishing homework, brushing teeth, or going to practice if they play sports.

Ideal for younger kids, the tracker comes in a variety of themed bands and faces for popular characters like Spiderman, Frozen 2's Anna or Elsa, Minnie Mouse, Disney Princess, and Star Wars so kids can sport their favorite characters on their wrist, or just choose from basic designs like blue stars. The band is adjustable and the tracker swim-friendly, with a user-replaceable battery that lasts for up to a year via the replaceable CR2 battery, which means you don't have to worry about recharging it every week.

Kids are motivated to get active minutes and reach goals, which unlocks adventures, games, and icons. For the Spiderman tracker, for example, kids explore the Spiderverse and as they achieve goals, they unlock more of the story. They can also pass the time playing tap challenge games and collect gems through movement to restore missing parts of a city on an adventure map, adding even more gamification to the experience.

Family members and friends can be invited to compete in daily step challenges using the Garmin Connect app, which parents can also use to assign tasks, like taking out the garbage, washing the dishes, cleaning up their rooms, or doing homework, either on the fly or a recurring schedule. A reminder icon shows the child exactly what they need to do and when. With a fun toe-to-toe challenge, kids can sync with someone nearby for a timed step competition, like to see who gets the most steps while raking leaves or going for a short walk around the block. The tracker also logs sleep data.


  • Bands and games for popular characters
  • Never have to recharge
  • You can swim with it
  • Use to track chores, homework, and more
  • Elements of gamification


  • Really tiny 0.61-inch screen
  • Not ideal for older kids
  • Games could be distracting

Best for More Than Fitness

Garmin vivofit jr. 2

Pick your favorite character

Kids can grab the tracker designed with their favorite movie character theme and log activity, sleep, chores, and more.

Best for Smartwatch Design: Vtech KidiZoom Smartwatch DX2

Technically, the KidiZoom DX2 is more of a fully-featured smartwatch than it is an activity tracker with features beyond the basics. And by smartwatch, I mean smartwatch tailored to kids with games, camera, and more versus notifications and calendar invites. That said, it does also keep track of steps via a built-in pedometer and includes some motion-controlled games that encourage kids to keep moving.

However, fitness isn't the primary focus here. This watch, suitable for kids aged 4-12, can be used to take videos and photos, including selfies with funny filters the kids can later turn into watch faces. Kids can also play games like Monster Detector, using augmented reality (AR) experiences to capture monsters in the real world. Parents can add other free games, watch faces, and camera effects in the online Learning Lodge. There are educational elements as well, though, like the Time Master tool that kids can use to learn how to tell him.

The watch, which has a 1.44-inch color touchscreen, comes equipped with 256MB of internal memory, expandable via an optional microSD card. It is splashproof, not fully waterproof, and comes in five color options: black, blue, camouflage, pink, and purple. The battery lasts for 2-3 days, depending on usage, and it has to be plugged into a computer using the included microUSB cable.


  • Large, color touchscreen
  • Plenty of downloadable games
  • Lots of customization options
  • You can take selfies


  • No sleep tracking
  • Not much focus on fitness
  • Has to plug into computer to recharge
  • Not fully waterproof
  • Only suitable for younger kids

Best for Smartwatch Design

Vtech KidiZoom Smartwatch DX2

More fun on your wrist

The KidiZoom DX2 is a fun watch for kids first and a fitness tracker second, but it still provides basic step counts.

Best for Budget: BIGGERFIVE Fitness Tracker Watch

If you're on an extremely tight budget, this fitness tracker is the cheapest of the bunch and while it doesn't have big brand name clout behind it, the watch is highly rated on sites like Amazon with previous buyers noting that they love its simplicity and say it works well.

Interestingly, the BIGGERFIVE even tracks more stats than the others, though it's unclear how accurate the data is, including activity and sleep as well as heart rate, distance traveled, and calories burned. It has 10+ activity and sport modes as well, which is great for kids who are involved in training or sports, including walking, running, bicycle, dance, basketball, football, tennis, climbing, and workout.

Monitor stats on the device itself or using the VeryFitPro, which is available for both Android and iOS devices. There, you can also set silent wake-up alarms (though which kid needs an alarm to wake up before their parents?) as well as call and message notifications from a connected smartphone and social media sites like Facebook, LinkedIn, WhatsApp, Instagram, and Twitter. You can set up to 10 alarm clocks, which is great for reminding kids not just to get active but to also do things like drink water, take medications, and more.

The company says the watch is ideal for kids aged 5 all the way up to 18: younger kids might not need the notifications but they can be turned on for older kids. Available in rose, pink, purple, blue, or black with a flexible strap, the battery lasts for up to seven days per charge and the watch is completely swim-proof.


  • You can swim with it
  • Set up multiple alarm clocks
  • Older kids can get notifications
  • Long battery life
  • Affordable


  • Parents might not like heart rate, calorie tracking for kids
  • Might not be as accurate as others

Get You Started

BIGGERFIVE Fitness Tracker Watch

Bank for the buck

Get tons of features in this affordable fitness tracker that might not be from a well-known brand but comes highly rated by buyers.

Best for Teaching Responsibility: Garmin vivofit jr. 3

A follow-up to the vivofit jr. 2, the Garmin vivofit jr. 3 features a larger square screen in a design that more resembles a mini smartwatch. Available in a variety of character themes, from Black Panther to The Little Mermaid, parents can choose the one they know their kid will absolutely love wearing around their wrist, which is a bonus.

The integrated and interactive games are connected to the watch's theme and managed through the Garmin app, which the parents can load on their phones if they don't already use it for their own smartwatch. Durable and swim-proof, it's also a huge bonus that the battery is replaceable and lasts for up to a year, so you don't have to worry about charging it up every week.

Kids are motivated through the various games to achieve active minute goals, unlocking new adventures as they do, getting new icons, and gaining access to new games. They can also enter toe-to-toe step challenges with others who own a vivofit jr. 3 (or vivofit jr. 2) and are nearby, like siblings, neighbors, and friends.

But the tracker is designed for parents to help teach their kids responsibility and keep track of things like chores and homework as well. Parents can assign tasks from the app, which will show up on the watch screen. Unfortunately, however, there's no way for the child to check off the task as complete unless they have their own phone, making this device more suitable to older kids with phones, though kids could use a tablet as well. It also tracks sleep and a nice added feature is quick access to emergency contact information using the ice widget.


  • You can swim with it
  • Replaceable battery lasts for a year
  • Can manage chores, homework, and more
  • Gamification of movement
  • Popular movie character themes


  • Screen backlight isn't great
  • Can't mark chores as done from watch screen
  • Expensive
  • Games could be distracting

Best for Teaching Responsibility

Garmin vivofit jr. 3

Chores, homework, and fitness

Kids can keep track of activity and sleep, and parents can use the watch to remind kids to do homework, chores, and more.

Why Get a Fitness Tracker for a Child?

Some parents are totally against the idea of fitness trackers for kids, but I'm all for it. First, the name is misleading. They really are activity and sleep trackers (for those that can track sleep as well), not designed for fitness like wearables for adults. Second, as long as they are introduced the right way, and used as a casual, fun, and motivational tool, there's nothing wrong with activity trackers for kids.

My nine-year-old has been wearing an activity tracker on his wrist for more than two years and he loves it. He mostly loves to learn how much and how well he slept and will keep an eye on activity and, depending on the watch, enjoy seeing clock animations or unlocking new features in games as he gets active. Some days he won't wear it at all, some days he will. Sometimes, we'll have fun family challenges to see who can get the most steps. But it's all about fun. There's no pressure or punishment. If he doesn't get to his 10,000 steps, who cares. Did ho go outside and get some active time? That's all that matters.

Especially at a time when many kids are doing virtual learning and spending less time outdoors and more time in front of screens, encouraging and motivating physical activity is a positive thing. As a parent, I feel much better when my son goes out in the backyard for 15 minutes on his lunch break than when he sits in front of the television or tablet. And knowing that mommy is beating him in the step challenge might be that extra push to convince him to go run around and save TV time for the evening.

This is precisely why I really love the Fitbit Ace 3 and consider it to be the best kids fitness tracker. It's pretty simple and doesn't push too much in terms of rewards for getting active: you aren't going to get to stare at the screen playing a game if you make it to 5,000 steps by noon, but you will see your little clock animate in an adorable way. My son simply loves having it on his wrist so he knows what time it is, and so he can help out by setting timers. He loves being able to swipe through menus and feel like he has his own cool gadget. But nothing is distracting about it. And the Ace 3 features useful reminders to move and bedtime reminders, alarms, and more that you can choose to activate, or not.

Fitness trackers — er, activity trackers — aren't really designed to tell kids that they need to get fit. They are designed to encourage them to move and get physical activity that will benefit them in the long run and promote healthy habits they can bring with them going forward as they get older.

Credits — The team that worked on this guide

Christine Persaud resides in Toronto, Ontario Canada with her husband and a talkative and smart 9-year-old son who needs no encouragement to get moving but loves his kids fitness tracker all the same.

Source: androidcentral

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